In today’s era, sustainable development has become a global consensus, and all walks of life are actively exploring the road of green development. As an important link in coal processing, coal preparation plant also shoulders the great responsibility of increasing green development.
一、Importance of green development of coal preparation plant
As an important link in coal processing, it is crucial for the coal preparation plant to firmly establish the concept of green development. To fight a good battle against pollution in depth is not only responsible for the environment, but also a necessary way for enterprises to achieve sustainable development. Accelerating the transformation to a modern park can enhance the competitiveness of the enterprise and lay a solid foundation for its high-quality development.
二、The key points of green development of coal processing plant
The key to the green development of coal preparation plant lies in the synergistic promotion of many aspects. Firstly, the construction of environmental protection facilities should be strengthened. Secondly, the implementation of energy saving and consumption reduction measures. Furthermore, promote the comprehensive use of resources. In addition, it should also focus on the greening of the transport link. In short, coal preparation plant only fully implement the concept of green development, from all aspects to start, in order to truly achieve high-quality development.
三、Environmental Protection Measures for Coal Processing Plants
1.Prevention and control of coal dust pollution
Coal preparation plant produces a large amount of dust and coal dust in the process of storage, loading and transport of coal, coal slurry and other materials, which brings serious harm to the health of workers and safe production. In order to reduce the pollution of coal dust, the coal preparation plant adopts measures such as dust suppression, dust reduction, dust removal and protection. In terms of dust suppression, the dust content of incoming raw coal is reduced and controlled by means of increasing the moisture content of incoming raw coal and ore-selecting slurry before sorting. For dust reduction, spraying and sprinkling are adopted to make the newly formed coal dust or the floating coal dust that has been diffused to settle down from the air, and the settling rate can reach more than 90%. Dust removal can adopt exhaust system and dust collector to exclude dust in the air; adopt effective negative pressure airtight system and dust collector in coal conveying system and process equipment to prevent coal dust from overflowing; adopt spraying device to inhibit dust flying; and also adopt negative pressure induced deducting system researched and developed by Xuzhou Botanic, which is made up of dust collection cover, dust suction port, negative pressure induced air duct, fan, spraying device, filter plate, cyclone device, exhaust decompression device, coal slurry conveying device and so on. The system consists of dust collection hood, suction nozzle, fan, spray device, filter plate, cyclone device, exhaust decompression device, coal slurry conveying device, etc. It has high dust removal efficiency, low water consumption, and has no effect on the moisture content of the raw coal, which greatly improves the operating environment. At the same time, when the dust level is too high at the operation site, the staff should wear dust masks, and the dust-producing equipment such as raw coal feeder and crusher should be closed for dust prevention measures.
2.Noise pollution prevention and control
Coal preparation plant machinery and equipment is concentrated, the production process will produce a lot of noise, to the production plant environment and the surrounding residential environment have caused serious noise pollution. In order to reduce the noise pollution of mechanical equipment and create a comfortable working environment, the coal preparation plant adopts vibration reduction technical measures. According to the performance and characteristics of mechanical equipment, the vibration isolation device vibration damping technical measures, simple and easy to implement, vibration damping effect is remarkable. Mechanical equipment foundation should be installed vibration isolation device, positive vibration isolation, vibration intensity level of high vibrating screen equipment, in order to meet the requirements of process performance, as far as possible, the use of vibration-damping effect of the rubber spring support; precision instruments and equipment, vibration isolation pads should be laid to carry out negative vibration isolation. Vibration isolation device is usually used vibration isolation, vibration isolation elements and fill a variety of vibration isolation materials, such as glass fibre plate, rubber, cork, felt and so on.
3.Prevention and Control of Coal Slurry Water Pollution
Coal preparation plant will discharge a large amount of coal slurry water in the process of washing raw coal. If the coal washing water is discharged directly without treatment, it will not only cause waste of water resources, but also cause serious pollution of surface water. Wastewater infiltration into farmland, will cause crop yield reduction; discharged into rivers and lakes, will silt the river, damaging the ecological environment, inhibit the growth of fish and shrimp, or even cause the death of fish and shrimp; infiltration into the ground, will contaminate the source of drinking water, inducing a variety of diseases. In order to realia the recycling of water resources, reduce water pollution and protect the ecological environment, the coal processing plant treats the coal mud water. If the mud is not serious, you can only use anionic polyacrylamide to get better overflow water quality. If the mud is serious, you need to add polymeric aluminium chloride to destroy the stable structure of the coal mud water, so that the colloids in the sewage lose stability and coalesce to form fine alumina, and then add polyacrylamide settlement, you can get clear overflow water.
4.Solid waste pollution prevention and control
Coal preparation plant production process, will produce coal harangue, failings, and coal combustion emissions of fly ash, slag and other solid wastes. The emission of coal harangue not only occupies a large amount of land, but also emits a large amount of soot and toxic gases such as hydrogen sulphide and carbon monoxide after weathering and spontaneous combustion, which will seriously pollute the atmospheric environment of the mining area and the surrounding areas. Some areas due to heavy rainfall, climate and other factors, resulting in harangue landslides, and even harangue mountain explosion and other accidents, seriously endangering the lives of local people, property safety. In order to reasonably deal with solid waste such as coal harangue, reduce occupying land and environmental pollution, and prevent safety accidents, coal processing plant to reasonably deal with solid waste. During the production period of the mine, the excavation harangue directly enters the main coal flow system. The washed harangue is transported to the harangue turnover yard for temporary storage in the first year of production, and is transported to the underground to fill in the second year of production; the harangue stored in the harangue turnover yard will be filled in the underground special roadway together with the washed harangue of the coal preparation plant after the harangue filling system is completed and put into operation. Hazardous waste will be disposed of by qualified units, and the environmental management of hazardous waste and solid waste storage facilities will be strengthened.
四、Future Outlook for Green Development of Coal Processing Plants
1.Technological innovation continues to promote
With the continuous progress of science and technology, coal processing plants will continue to increase technological innovation in green development. In the future, intelligent coal processing technology will be more widely used, through big data analysis and artificial intelligence algorithms, to achieve accurate control of the coal selection process, improve coal selection efficiency while reducing energy consumption and environmental pollution. For example, the use of intelligent sensors to monitor the real-time operating status of equipment and environmental parameters, timely adjustment of the production process to reduce unnecessary waste of resources. At the same time, the research and development of new environmental protection materials and equipment will also provide strong support for the green development of coal processing plant. Such as the development of more efficient dust filter media, improve the dust filtration efficiency; research and development of new sewage treatment chemicals, to further enhance the water purification effect.
2.Deepening and expanding comprehensive mutilation of resources
In the future, the coal plant will further deepen the comprehensive use of resources. In addition to the harangue for brick making and other traditional uses, but also to explore more high value-added ways of use. For example, the harangue will be used to extract valuable elements, such as aluminium and silicon, to achieve the recycling of resources. At the same time, the comprehensive mutilation of coal slurry will be strengthened, and coal slurry combustion technology will be developed to improve the energy mutilation of coal slurry and reduce the dependence on coal resources. In addition, the coal preparation plant will actively explore synergistic development with other industries, such as cooperating with the building materials industry to produce environmentally friendly building materials using coal preparation by-products, so as to achieve the extension of the industrial chain and maxima the use of resources.
3.Better ecological construction
The coal preparation plant will pay more attention to ecological construction and create a green ecological plant. On the one hand, it will continue to increase the greening of the plant, introduce more plant varieties suitable for the local climate and soil conditions, and improve the greening rate of the plant. Not only can it beautify the environment, but also absorb pollutants in the air and improve air quality. On the other hand, strengthen the restoration and protection of the surrounding ecological environment. For example, reclaim the abandoned land in the mining area, plant vegetation and restore the ecological function. At the same time, it actively participates in the ecological management of the surrounding rivers and lakes to reduce the impact of the coal processing plant on the surrounding water environment. Through ecological construction, the coal processing plant and the natural environment to achieve a harmonious symbiosis.
cof
4.Strengthening industry cooperation and communication
In the future, the cooperation and exchange between coal preparation plants and with related industries will be closer. Through industry associations, technical seminars and other platforms, we will share green development experience and technical achievements, and jointly promote the green transformation of the coal preparation industry. At the same time, it will strengthen cooperation with scientific research institutions and universities, carry out cooperation projects between industry, academia and research institutes, and jointly overcome technical difficulties in the green development of coal beatification industry. In addition, coal preparation plant will also actively participate in international cooperation and exchanges, learn from foreign advanced green coal preparation technology and management experience, and enhance the international competitiveness of China’s coal preparation industry.
In short, coal preparation plant green development prospects, the future will continue to make new breakthroughs in technological innovation, comprehensive utilization of resources, ecological construction and industry cooperation, to achieve sustainable development of the coal industry to make greater contributions.
In short, the green development of coal preparation plant is an inevitable choice to achieve the sustainable development of the coal industry. Coal preparation plant should actively practice the concept of green development, adopt advanced production technology and environmental protection equipment, strengthen the recycling of resources, achieve energy saving and emission reduction, and improve the staff’s environmental awareness and sense of responsibility. Only in this way can the coal preparation plant be invincible in the fierce market competition and achieve the organic unity of economic, social and environmental benefits.
